You can find a seating map for an Airbus A319 on SeatGuru.com or SeatMaestro.com. Passengers can normally view their flights' seating plans on the airlines' websites while booking online, and some airlines feature their planes' seat maps on their websites. Seating plans vary according to the airline and route.
To find a seating map for a specific Airbus A319 on SeatGuru.com or SeatMaestro.com, enter the airline name, flight number and date in the search box under Find Seat maps. Alternatively, enter Airbus A319 in the search box at the top of the home page and scroll down to select from the list of different airlines' seat maps.
United Airlines offers seat plans for its A319 on its website. Click Travel Information on the home page, select Inflight Services from the drop-down menu, click Aircraft and scroll down to click A319 to view the seat map.